Jinhao Hu

pd/tls: add upgrade tls description

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### First-time contributors' checklist - [ ] I've signed [**Contributor License Agreement**](https://cla-assistant.io/pingcap/docs-tidb-operator) that's required for repo owners to accept my contribution. ### What is changed, added, or deleted? (Required) ###...

Add middleware to PD microservice

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## Enhancement Task Currently, the API for microservice nodes(TSO/Scheduling) is implemented by the redirector and does not take into account the middleware of the API itself, such as audit logs....

[DNM]: add log for tikv-ctl to fix flashback

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Signed-off-by: husharp ### What is changed and how it works? Issue Number: Close #xxx What's Changed: ```commit-message ``` ### Related changes - PR to update `pingcap/docs`/`pingcap/docs-cn`: - Need to cherry-pick...

pd: support schema change by tls

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### What problem does this PR solve? ### What is changed and how does it work? ### Code changes - [ ] Has Go code change - [ ] Has...